Hearing aid



FIG. 1 is a front elevational view of a hearing aid, showing our newdesign;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a side elevational view thereof, in use condition.

The broken line showing is for illustrative purposes only and forms nopart of the claimed design.

The ornamental design for a hearing aid, as shown and described.